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using System;
using System.Collections.Generic;
using System.Diagnostics.CodeAnalysis;
using System.Linq;
using System.Text.RegularExpressions;
using System.Threading.Tasks;
using StardewModdingAPI.Toolkit;
using StardewModdingAPI.Toolkit.Framework.Clients.Wiki;
using StardewModdingAPI.Toolkit.Framework.UpdateData;
using StardewModdingAPI.Web.Framework.Clients;
namespace StardewModdingAPI.Web.Framework
{
/// <summary>Handles fetching data from mod sites.</summary>
internal class ModSiteManager
{
/*********
** Fields
*********/
/// <summary>The mod sites which provide mod metadata.</summary>
private readonly IDictionary<ModSiteKey, IModSiteClient> ModSites;
/*********
** Public methods
*********/
/// <summary>Construct an instance.</summary>
/// <param name="modSites">The mod sites which provide mod metadata.</param>
public ModSiteManager(IModSiteClient[] modSites)
{
this.ModSites = modSites.ToDictionary(p => p.SiteKey);
}
/// <summary>Get the mod info for an update key.</summary>
/// <param name="updateKey">The namespaced update key.</param>
public async Task<IModPage> GetModPageAsync(UpdateKey updateKey)
{
if (!updateKey.LooksValid)
return new GenericModPage(updateKey.Site, updateKey.ID!).SetError(RemoteModStatus.DoesNotExist, $"Invalid update key '{updateKey}'.");
// get site
if (!this.ModSites.TryGetValue(updateKey.Site, out IModSiteClient? client))
return new GenericModPage(updateKey.Site, updateKey.ID).SetError(RemoteModStatus.DoesNotExist, $"There's no mod site with key '{updateKey.Site}'. Expected one of [{string.Join(", ", this.ModSites.Keys)}].");
// fetch mod
IModPage? mod;
try
{
mod = await client.GetModData(updateKey.ID);
}
catch (Exception ex)
{
mod = new GenericModPage(updateKey.Site, updateKey.ID).SetError(RemoteModStatus.TemporaryError, ex.ToString());
}
// handle errors
return mod ?? new GenericModPage(updateKey.Site, updateKey.ID).SetError(RemoteModStatus.DoesNotExist, $"Found no {updateKey.Site} mod with ID '{updateKey.ID}'.");
}
/// <summary>Parse version info for the given mod page info.</summary>
/// <param name="page">The mod page info.</param>
/// <param name="subkey">The optional update subkey to match in available files. (If no file names or descriptions contain the subkey, it'll be ignored.)</param>
/// <param name="mapRemoteVersions">The changes to apply to remote versions for update checks.</param>
/// <param name="allowNonStandardVersions">Whether to allow non-standard versions.</param>
public ModInfoModel GetPageVersions(IModPage page, string? subkey, bool allowNonStandardVersions, ChangeDescriptor? mapRemoteVersions)
{
// get base model
ModInfoModel model = new();
if (!page.IsValid) {
model.SetError(page.Status, page.Error);
return model;
}
if (page.IsSubkeyStrict && subkey is not null) {
if (subkey.Length > 0 && subkey[0] == '@') {
subkey = subkey.Substring(1);
}
}
// fetch versions
bool hasVersions = this.TryGetLatestVersions(page, subkey, allowNonStandardVersions, mapRemoteVersions, out ISemanticVersion? mainVersion, out ISemanticVersion? previewVersion, out string? mainVersionUrl, out string? previewVersionUrl);
if (!hasVersions)
return model.SetError(RemoteModStatus.InvalidData, $"The {page.Site} mod with ID '{page.Id}{subkey ?? ""}' has no valid versions.");
model.SetBasicInfo(page.GetName(subkey) ?? page.Name, page.GetUrl(subkey) ?? page.Url);
// return info
return model.SetVersions(mainVersion!, previewVersion, mainVersionUrl, previewVersionUrl);
}
/// <summary>Get a semantic local version for update checks.</summary>
/// <param name="version">The version to parse.</param>
/// <param name="map">Changes to apply to the raw version, if any.</param>
/// <param name="allowNonStandard">Whether to allow non-standard versions.</param>
public ISemanticVersion? GetMappedVersion(string? version, ChangeDescriptor? map, bool allowNonStandard)
{
// try mapped version
string? rawNewVersion = this.GetRawMappedVersion(version, map);
if (SemanticVersion.TryParse(rawNewVersion, allowNonStandard, out ISemanticVersion? parsedNew))
return parsedNew;
// return original version
return SemanticVersion.TryParse(version, allowNonStandard, out ISemanticVersion? parsedOld)
? parsedOld
: null;
}
/*********
** Private methods
*********/
/// <summary>Get the mod version numbers for the given mod.</summary>
/// <param name="mod">The mod to check.</param>
/// <param name="subkey">The optional update subkey to match in available files. (If no file names or descriptions contain the subkey, it'll be ignored.)</param>
/// <param name="allowNonStandardVersions">Whether to allow non-standard versions.</param>
/// <param name="mapRemoteVersions">The changes to apply to remote versions for update checks.</param>
/// <param name="main">The main mod version.</param>
/// <param name="preview">The latest prerelease version, if newer than <paramref name="main"/>.</param>
private bool TryGetLatestVersions(IModPage? mod, string? subkey, bool allowNonStandardVersions, ChangeDescriptor? mapRemoteVersions, [NotNullWhen(true)] out ISemanticVersion? main, out ISemanticVersion? preview, out string? mainVersionUrl, out string? previewVersionUrl)
{
main = null;
preview = null;
mainVersionUrl = null;
previewVersionUrl = null;
// parse all versions from the mod page
IEnumerable<(IModDownload? download, ISemanticVersion? version)> GetAllVersions()
{
if (mod != null)
{
ISemanticVersion? ParseAndMapVersion(string? raw)
{
raw = this.NormalizeVersion(raw);
return this.GetMappedVersion(raw, mapRemoteVersions, allowNonStandardVersions);
}
// get mod version
ISemanticVersion? modVersion = ParseAndMapVersion(mod.Version);
if (modVersion != null)
yield return (download: null, version: modVersion);
// get file versions
foreach (IModDownload download in mod.Downloads)
{
ISemanticVersion? cur = ParseAndMapVersion(download.Version);
if (cur != null)
yield return (download, cur);
}
}
}
var versions = GetAllVersions()
.OrderByDescending(p => p.version, SemanticVersionComparer.Instance)
.ToArray();
// get main + preview versions
void TryGetVersions([NotNullWhen(true)] out ISemanticVersion? mainVersion, out ISemanticVersion? previewVersion, out string? mainVersionUrl, out string? previewVersionUrl, Func<(IModDownload? download, ISemanticVersion? version), bool>? filter = null)
{
mainVersion = null;
previewVersion = null;
mainVersionUrl = null;
previewVersionUrl = null;
// get latest main + preview version
foreach ((IModDownload? download, ISemanticVersion? version) entry in versions)
{
if (entry.version is null || filter?.Invoke(entry) == false)
continue;
if (entry.version.IsPrerelease()) {
if (previewVersion is null) {
previewVersion = entry.version;
previewVersionUrl = entry.download?.Url;
}
} else {
mainVersion = entry.version;
mainVersionUrl = entry.download?.Url;
break; // any others will be older since entries are sorted by version
}
}
// normalize values
if (previewVersion is not null)
{
if (mainVersion is null) {
// if every version is prerelease, latest one is the main version
mainVersion = previewVersion;
mainVersionUrl = previewVersionUrl;
}
if (!previewVersion.IsNewerThan(mainVersion)) {
previewVersion = null;
previewVersionUrl = null;
}
}
}
if (subkey is not null) {
TryGetVersions(out main, out preview, out mainVersionUrl, out previewVersionUrl, entry => entry.download?.MatchesSubkey(subkey) == true);
if (mod?.IsSubkeyStrict == true)
return main != null;
}
if (main is null)
TryGetVersions(out main, out preview, out mainVersionUrl, out previewVersionUrl);
return main != null;
}
/// <summary>Get a semantic local version for update checks.</summary>
/// <param name="version">The version to map.</param>
/// <param name="map">Changes to apply to the raw version, if any.</param>
private string? GetRawMappedVersion(string? version, ChangeDescriptor? map)
{
if (version == null || map?.HasChanges != true)
return version;
var mapped = new List<string> { version };
map.Apply(mapped);
return mapped.FirstOrDefault();
}
/// <summary>Normalize a version string.</summary>
/// <param name="version">The version to normalize.</param>
private string? NormalizeVersion(string? version)
{
if (string.IsNullOrWhiteSpace(version))
return null;
version = version.Trim();
if (Regex.IsMatch(version, @"^v\d", RegexOptions.CultureInvariant | RegexOptions.IgnoreCase)) // common version prefix
version = version.Substring(1);
return version;
}
}
}
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